I just found that if you have students names with accents, the mail tool is not finding the files in the file system, and is not sending them an email.

The error just dies silently and doesn't give an error on the mail. That is, in the interface there is just an empty string, instead of "done" or "fail."

It just throws a "file not found error" on the debug. For instance:

[   1773,   0.38] No file: /home/user/MC-Projects/project//cr/corrections/pdf/0010-João Surname.pdf

And every student with an accent in their name is given the same error. I searched and the file exists.

I'm using Ubuntu 17.10 with AMC 1.3.0+it2018-04-06.